毕业论文：基于单片机交通灯设计.doc

摘要 一个完整的交通灯相当于一个简单的单片机系统，该系统有交通灯设置电路、单片机、显示电路等构成。信号灯控制的实现是通过电路与汇编程序的结合来完成，其中信号灯的模拟采用了发光二极管，发光二极管有熄灭、点亮和闪烁三种信号，其中闪烁信号的产生运用了延时程序来实现，而时间倒数方面引进了LED数字显示，克服了人们在等待时的心急的心情，减少了红灯未灭，闯红灯的现象。电路部分原理图是通过用PROTEL软件绘制设计，汇编程序的设计与调试都在KEIL上完成。最后使用PROTEUS软件上的虚拟元件来代替所有的电路元件完成整个系统的调试和仿真，这样就大大保证了焊制硬件实物能正常运行。 本系统功能设计完善，采用AT89C51单片机为核心，具有实用，方便，灵活的特点。随着电子技术的广泛应用，车辆日益增多将成为一种发展趋势，所以要有一套安全可靠的交通指示灯。 关键字：AT89C51；LED显示；交通灯 Abstract A complete traffic signal equivalent to a simple single-chip system, which has set up traffic lights circuit, microcontroller, display circuit, etc.. The realization of the control signal through the circuit and the combination of the compilation process to complete, including analog signal using a light-emitting diodes, light emitting diodes are off, the three flashing lights and signals, flashing signals which have used the procedure to delay the realization of The last time the introduction of LED digital display, to overcome the people anxiously waiting for the mood at the time, a decrease of red light did not eliminate, the phenomenon of red light running. Part of the circuit schematic diagram is drawn by using PROTEL software design, compilation and debugging of the design procedures are completed in KEIL. PROTEUS software on the final use of the virtual component to replace all the circuit elements to complete the testing and simulation systems, so much to ensure that the welding system to the normal operation of the physical hardware. The well-designed system using AT89C51 single-chip microcomputer as the core, with practical, convenient and flexible. With the extensive application of electronic technology, an increasing number of vehicles will become a trend, so to have a safe and reliable indicator of the traffic. Key?word:?The?AT89?C51；LED?show；traffic?lights 目录 摘要。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。1. Abstract。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。2 1绪论。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。3 1.1 本课题的研究背景和意义。。。。。。。。。。。。。。